432 NORTH AMERICAN BIRDS. 



Darker and richer colored throughout than in 

 either 3T. heervianni or M. samuelis, the gen- 

 eral size much as in former, but bill much 

 more slender and tai-si longer ; wing 2.50- 

 2.80 (2.62), tail 2.50-2.70 (2^00), culmcn .52- 

 .55 (.54), depth of bill .22-.27 (.25), tarsus .90- 

 .95 (.93). Jfab. Southern Mexico (Puebla, 

 Valley of Mexico, etc.). 



M. fasciata mexicana Hidgw. Mexican Song 

 Sparrow.' 

 e'. Streaks on back rusty, usually without blackish shaft-line ; 

 streaks on chest dear rusty or rufous; length 6.10-6.50, 

 wing 2.40-2.73 (2.59), tail 2.65-3.05 (2.83), culmcn .49-.52 

 (.51), depth of bill .27-.29 (.28), tarsus .S1-.90 (.86). Ilab. 

 Arizona (in lower districts). 

 (68.) 581(7. M. fasciata fallax (Baiud). Desert Song Sparrow. 



d^. Markings of plumage more or less obscured by the prevalent dull 

 rustj- or sooty coloring. 

 e'. Smaller, with general tone of coloration more rust}- ; length 

 about 6.00-7.00, wing 2.43-2.83 (2.63), tail 2.40-2.98 (2.73), 

 culmcn .53-.58 (.55), depth of bill .26-.30 (.28), tarsus .87- 

 .92 (.90). Eggs .82 X -59. Hab. Pacific coast district, 

 breeding from western Oregon (and northern California?) 

 north to British Columbia (Vancouver Island, etc.). 

 581e. M. fasciata guttata (Nltt.). Rusty Song Sparrow. 

 e'. Larger, with general tone of coloration more sootj- ; length 

 about 6.50-7.50, wing 2.62-3.05 (2.87), tail 2.05-3''.18 (2.89), 

 culmcn .56-.61 (.58), depth of bill .25-.28 (.27), tarsus .95- 

 1.05 (1.00). Jlab. Coast of southern Alaska (and northern 

 British Columbia?). 

 581/. M. fasciata rufina (Brandt). Sooty Song Sparrow, 

 c^. Wing more than 3.10, eulmen .64, or more. 



Plumage much .as in 3L rufinn, but decidedly gnayer ; length about 



7.50-8.75, wing 3.20-3.50 (3.36), tail 3.08-3.60 (3.44), eulmen .64- 



.72 (.69), depth of bill .30-.32 (.31), t.arsus 1.05-1.15 (1.11). Eggs 



.89 X -GS- Hub. Aleutian Islands, and cast to Fort Kenai, Alaska. 



(CO.) 582. M. cinerea (CiMEL.). Aleutian Song Sparrow. 



v. Adult with chest grayish (tinged with brown in winter), very indistinctly 



or not at all streaked or otherwise marked ; top of head plain chestnut, 



becoming black, on forehead and sides of occiput, or else very broadly 



streaked with bl.ack and divided by a more or less distinct median lino 



of light ashy or dull bulfy ; postocular streak dusky. 



Adult : Sides of head and neck, togothor with chest, ashy, tinged with 



^ Melospisa mclodia, var. mexicana RiDGW., in Ilist. N. A. B. ii. 1874, IS. 



